What a ridiculous argument. Autism is a clearly diagnosable condition whereas hyperactivity is not, IMHO. How do you distinguish between a kid who's just overly active to one who truly is hyperactive?
Look, I am not saying that the drugs don't have a place, they do. However, I think people are too quick to say "wow, he's really active, he needs Ritalin."
Lastly, I have a curious mind, I want to see data on the long term affects of Ritalin on children. To my knowledge, there isn't any. Which should be of concern to all parents, yes?